LOS ANGELES, Calif. (December 12, 2013) – William Dumbauld, a 75-year old Rossmoor (Los Alamitos) resident and retired
Los Angeles Police Department officer, is no stranger to life-threatening
heart maladies. Having endured the passing of both parents and several
aunts and uncles to heart attacks, Dumbauld did not want to suffer a similar
fate after being diagnosed with Coronary Artery Disease (CAD). In 2010,
he underwent a stent procedure for one blocked artery and was recently
diagnosed with another blockage in a different artery after taking a nuclear
stress test. With the artery being nearly 80 percent blocked, his long-time
cardiologist, Dr. Guy Mayeda of Good Samaritan Hospital, recommended a
new device called the Diamondback 360® Coronary Orbital Atherectomy
System (OAS) to sand and pulverize the large amount of calcification that
Spearheaded by Dr. Mayeda, the Heart & Vascular Center at Good Samaritan
Hospital recently became the first facility on the West Coast to use the
Diamondback 360® Coronary OAS from Cardiovascular Systems, Inc. (CSI).
This technology is the first evidence-based, safe device approved by the
FDA for treating severely calcified coronary lesions.
Coronary Artery Disease (CAD) is a life-threatening condition and leading
cause of death in men and women in the United States. CAD occurs when
a fatty material called plaque builds up on the walls of arteries that
supply blood to the heart. The plaque buildup causes the arteries to harden
and narrow (atherosclerosis), reducing blood flow. The risk of CAD increases
if a person has one or more of the following: high blood pressure, abnormal
cholesterol levels, diabetes, or family history of early heart disease.
According to the American Heart Association, 16.3 million people in the
United States have been diagnosed with CAD.
The Diamondback 360® Coronary OAS uses a patented combination of differential
sanding and centrifugal force to reduce arterial calcium that can cause
complications when treating CAD. Arterial calcium is a common occurrence
in patients with severe vascular disease, with moderate to severe arterial
calcium present in nearly 40 percent of patients undergoing a percutaneous
coronary intervention in the U.S.
“This new technology provides patients undergoing coronary intervention
on severely calcified arteries the first ever treatment approved by the
FDA for this high risk patient population,” explains Dr. Mayeda.
“For patients like Mr. Dumbauld, this Roto-Rooter-like device helps
the cardiologist safely remove most of the calcium build-up and thereby
facilitate both the delivery and expansion of a stent within the blocked
The Diamondback 360
® Coronary OAS is an eccentrically mounted 1.25-millimeter diamond-coated
crown that sands away calcium in severely calcified coronary arteries,
enabling stent deployment. As the crown rotates and its orbit increases,
centrifugal force presses the crown against the lesion, reducing arterial
calcium, while healthy tissue flexes away.
Dr. Mayeda successfully performed Mr. Dumbauld’s procedure in less
than 60 minutes on December 9, 2013. He was released from the hospital
the next day with his wife Karen still holding him to his promise that
they will begin taking ballroom dancing lessons once he is fully recovered.
“I felt better right after the procedure and recommend it to anyone
who is a candidate,” says Dumbauld. “My wife and I are looking
forward to travelling to Europe and taking our first ballroom dancing
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About Good Samaritan Hospital
First opened in 1885, Good Samaritan Hospital is a 408-bed tertiary care
facility offering some of the most comprehensive care in Los Angeles.
Specializing in cardiac services, women’s services, orthopedics,
oncology, and ophthalmology, Good Samaritan Hospital offers Cardiology
and Cardiothoracic Surgery, Neurosciences program featuring the Gamma
Knife radiosurgery, Ophthalmologic Program including Retinal Surgery,
Orthopedic Surgical Program including Sports Medicine, Oncology Program
using the latest in radiation therapy – IMRT and HDR, Kidney Stone
services, Samaritan Imaging Center, Transfusion-Free Medicine and Surgery
Center, and Emergency Services. For more information visit